F. H. Richardson's bluebook of projection (1935)

Record Details:

Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

POWER Sl'PPLY FOR SOUND SYSTEMS 497 however, cannot be used as charging current. It would first charge the battery and then discharge it, repeating this cycle of events 60 times a second (assuming the current to be 60-cycle). (12) Therefore a. c. must be converted to direct current if it is to be used as charging power. (13) In comparatively rare cases an a. c. motor drives a d. c. generator which in turn charges the batteries, but the commonest form of a. c. charger makes use of a rectifying tube. A charger of that type is shown schemati FUSE BLOCK Fig. 114. — Type 40 G.E. Tungar Battery Charger. cally in Figure 114. We are now prepared to trace its circuit in detail and to study the action of its tubes. Filament Circuits of Figure 114 (14) In the center of Figure 1 14 are two circles, each containing an inverted "V" with a horizontal line above